Wow
I'm sure you know how good this is, so I don't really have to tell you that this is fucking awesome. So I guess I could just give you a quick suggestion.
Considering that this is going into a Newgrounds calender, I think you should work more on the idea that you did with the Hominid in the back ground. Alien Hominid is a good example of the "good side" of Newgrounds. So maybe put a few more iconic characters behind the good knight. And alternatively, some examples of bad icons that make up the evil side.
What you have here is really great, in fact it could go in the calender like this and still be great. This is just something I thought you should consider to make it more Newgrounds related.